设有一台精度等级为 0.5 级的电子电位差计，量程为0～1000℃，在正常情况下进行检验，测得的最大绝对误差为+6℃ ，问该电子电位差计是否合格？

答案是：解：仪表允许的最大绝对误差为： △max =1000 ×（ ±0.5% ）=±5℃（3分） 现测得的最大绝对误差为 6℃ >5℃ ，（1分） 故该电子电位差计不合格。

何为无扰动切换。

答案是：控制系统在切换的瞬间,应当保持控制器的输出不变,这样才能使执行器的位置在切换过程中不致于突变,不会对生产过程引起附加的扰动,这称为无扰动切换。

控制流程图中仪表字母代号分别为PI－307、TRC-201说明所代表的意义。

答案是：PI－307 压力指示仪表，该仪表为集中仪表盘面安装，工段号为3，仪表序号为07；TRC－303具有记录功能的温度控制器，集中仪表盘面安装，工段号为3，仪表序号为03。

最常见的操纵变量是 ，另外也有 作为操纵变量。

答案是：流量，转速等

8． 流量计最适合测量小流量。 流量计用于测量粘度较大的介质。

答案是：8.转子流量计、椭圆齿轮式流量计

描述对象特性的参数有 ，被调参数达到新稳态值的 所需的时间就是时间常数 T。

答案是：7.K 、T、τ 63.2%

一种前馈控制系统能克服 种干扰；反馈控制系统能克服 干扰。

答案是：6.一 全部

．DDZ-Ⅲ电动仪表的标准输入信号范围为 。 气动仪表的标准输入信号范围为 。

答案是：5.20～100KPa、4～20mA DC

常用热电偶分度号有 热电偶输出是 值。

答案是：4.B、S、K 电势

1．工业热电偶应用时使用补偿导线的目的是 。

答案是：1.延伸冷端到温度恒定处

8． 确定最合适的P、I、D参数，对于单回路的简单控制系统，以下哪些在希望的过渡过程中（ ）（多选题） A. 7：1 B. 9：1 C. 12：1 D.50：1 E. 5

答案是：ABE

7．下列常用控制规律中哪几个属于有差控制( )（多选题） A. P； B.PI； C. PD； D. PID

答案是：AC

6．控制系统中，调节器的积分时间越小，则（ ）。（ 多选题 ） A. 余差越小 B. 积分作用越弱 C. 积分作用越强 D. 余差越大 E. 过渡过程振荡越激烈

答案是：ACE

5．已知一个对象特性的一阶微分方程为： 判断T为（ ）。 A. 6 B. 10 C. 1 D. 0

答案是：ACE

4．下列流量计哪一个不能用于测量导电率小于自来水的介质（ ）。 A.差压流量计 B.电磁流量计 C.椭齿流量计 D.漩涡流量计

答案是：A

3．判断下图为调节系统在阶跃干扰作用下的过渡形式（ ）。 A.非周期衰减过程 B.衰减振荡过程 C.等幅振荡过程 D.发散振荡过程

答案是：B

2．对象特性参数T是反映对象（ ）的参数。通常希望控制通道的T（ ）。 A. 小一点 B. 动态特性 C. 静态特性 D. 大一点

答案是：BA

1．控制系统的过渡过程品质指标中，余差表示（ ）。 A. 调节参数与被调参数之差 B. 测量值与给定值之差 C. 新稳态值与给定值之差 D. 超调量与给定值之差

答案是：C

某台往复式压缩机的出口压力范围为25～28 MPa，测量误差不得大于1 MPa，工艺上要求就地观察，并能实现高低限报警，若选用 YX－150型电接点压力表，测量范围为0～60Mpa，精度等级为1.5级。试确定该仪表的上下限值、精度等级是否符

答案是：4.（6分） . 解：1）仪表的上限值为： P1＝Pmax×2=28×2=56 Mpa (2分) 2）仪表的下限值： 25/60>1/3 故被测压力的最小值不低于满量程的1/3. (2分) 3） 允许误差为: 1/60 × 100%=1.67% (2分) 所以, 仪表的上下限值、精度等级完全可以满足要求

．电－气阀门定位气的作用是什么（

答案是：2.(3分) 电气阀门定位器一方面具有电气转换器的作用，可用电动控制器输出的变为气信号信号去操纵气动执行机构。另一方面还具有气动阀门定位器的作用，可以使阀门位置按控制器送来的信号准确定位。

控制器参数整定的任务是什么？工程上常用的控制器参数整定有哪几种方法。（3分）

答案是：确定最合适的P、I、D，对于单回路的简单控制系统，一般希望过渡过程呈4：1（10：1）的衰减振荡过程。(1分) 工程上常用的控制器参数整定方法有:临界比例度法、衰减曲线法、经验法。（2分）

DDZ-Ⅲ电动仪表的标准输入信号范围为 。 气动仪表的标准输入信号范围为 。

答案是：9.20～100KPa、4～20mA DC

反馈控制系统检测的是 量； 前馈控制系统检测的是 量。

答案是：8.被控量 干扰量。

控制器设纯比例规律时，应设Ti= Td= 。

答案是：Ti=∞ Td=0

广义对象包括 。

答案是：6.调节阀、被控对象、测量元件及变送器。

阀阻比S＝ ，当S＝1时 与 一致。

答案是：阀阻比S＝ ，当S＝1时 与 一致。

4．控制流程图中某仪表字母代号为FRC-103代表 。

答案是：带有记录功能的流量控制仪表,工段号为1,仪表序号为3

3．热电阻测温时，采用三线制的连线方法的目的是 。

答案是：消除引线电阻,提高测量精度。

2．确定最合适的P、I、D，对于单回路的简单控制系统，一般希望过渡过程的衰减比数值为 的衰减振荡过程。

答案是：4:1～10:1

1．描述对象特性的参数有 。

答案是：1.K、T、τ。

8．下列常用控制规律中哪几个属于有差控制？（ ）（多选题） A. P B.PI C.PD D.PID

答案是：AC

7．调节阀的理想流量特性有（ ）。（ 多选题 ） A. 直线型 B. Y 型 C. 等百分比型 D. x型 E. 快开型

答案是：ACE

6．控制系统中，调节器的比例度越小，则（ ）。（ 多选题 ） A. 余差越小 B. 过渡过程越平缓 C. 可能发散振荡 D. 余差越大 E. 过渡过程振荡越激烈

答案是：ACE

5．被测介质为具有腐蚀性的流动液体压力测量时，需安装加有中性介质的隔离罐，设被测介质密度大于隔离液密度，判断下图中的哪一个为正确取压方案？（ ） A. a图 B. b图 C. c图

答案是：C

判断下图为调节系统在阶跃干扰作用下的过渡形式（ ）。 A. 衰减振荡过程 B. 非周期衰减过程 C. 等幅振荡过程 D. 发散振荡过程

答案是：C

K是反映对象（ ）的参数，希望干扰通道的K（ ）。 A. 动态特性 B. 小一点 C. 静态特性 D. 大一点

答案是：B

下列流量计中哪一个最适合小流量、小管经的流量测量？（ ） A. 差压流量计 B. 转子流量计 C. 椭齿流量计 D. 漩涡流量计

答案是：B

1．椭圆齿轮流量计的体积流量计算公式是( )。 A. Q = 3nV0 B. Q =2 nV0 C. Q =4 nV0 D. Q = nV0

答案是：C

65. 对此事我记忆犹新，就像昨天发生的一样。（as though）

答案是：65. I remembered it as though it happened yesterday.

64. 周教授一生都致力于语言教学事业。（be committed to）

答案是：64. Professor Zhou is committed to the cause of language teaching all his lifetime.

63. 桑迪如此喜欢摇滚音乐以至不顾父亲的反对而将音量放大。（appeal to）

答案是：63.Rock music appealed to Sandy so much that she turned it up, paying no attention to her father’s objection.

62. 既然我们已经学完这门课程，就应该多做些复习。（now that）

答案是：62.Now that we have finished the course, we shall start doing more revision work.

61. 媒体比如电视、网络、报纸等在人们的生活中起到越来越重要的作用。(play a role)

答案是：61. Media , such as television, network, newspaper, are playing more and more important role in people’s lives.

IV. Banked Cloze (1*10=10 points) Directions: Fill in the blanks in the following passage by selecting suitable words f

答案是：51.A. assets 52. E. excellent 53. L. origin 54. N. up-to-date 55. B. attend 56. G. guidelines 57. C. aware of 58. H. involved 59. D. especially 60. volunteering

Be yourself. Many how-to books advise you to stride into a room and impress others__41__your qualities. They__42__ you t

答案是：ACBBDCABBB

40. Farmers will have a good harvest, _______ that the weather is favorable. A) assuming B) resumin

答案是：A

39. She told me that if she was not _______within the next two years he was going to change jobs. A) rewarded

答案是：C

38. Many Europeans _______the continent of Africa in the 19th century to find out what it was like. A) expended

答案是：D

37. After winning the next term of office, the new government then _______to take steps to develop the national wealth.

答案是：B

36. After being apart for so long, he suddenly felt a(n) _______desire to see his girlfriend as soon as possible. A) in

答案是：A

35. To satisfy my _______about the history of my family, I went to visit the small village in the mountains where my gre

答案是：C

34. Government officials visited the flood area on Thursday morning to _______the relief efforts. A) instruct

答案是：B

We were _______to hear the news that the well-known writer, in her late eighties, was still writing a book. A) determi

答案是：B

32. The investigation showed that the mistake was _______ part of the authorities. A) on B) in C) with

答案是：A

31. The young couple _______about the high cost of visiting Europe. A) appreciated B) revealed C) de

答案是：D

30. It’s difficult to find a job these days. Many young people don’t even get a(n) _______from companies they are applyi

答案是：C

29. If you go to the interview in such old-fashioned clothes, you’ll _______your chance of getting the job. A) ruin

答案是：A

28. I want you to be very _______when you look in the park for the missing woman so you won’t miss her. A) relevant

答案是：B

27. He has made a(n) _______remark that angers all of us. A) defensive B) ambitious C) offen

答案是：C

26. He managed to hide his _______ and moved to a new town where people would not know him. A) personality

答案是：B

25. The project has been somewhat _______ from reaching greater success, and much remains undone. A) protected

答案是：D

24. From my _______, Victor Hugo is the greatest writer the world has ever known. A) respective

答案是：C

23. At a later stage, some new problems _______, which seemed more difficult to deal with. A) rose

答案是：C

22. It was a (n) _______achievement; no one has ever won the championship five times before. A) unique

答案是：A

21.When you are writing directions, you’ve got to be direct and _______to make everything rightly understood. A) obviou

答案是：B

20. What can be the main idea of the passage? A) Two groups of people participated in an experiment. B) Light-colored

答案是：D

19. What does the underlined word “subjects” mean? A) Examinees. B) Students. C) People involv

答案是：C

18. How will beautiful rooms influence visitors at an exhibition? A) They will make visitors walk faster. B) They will

答案是：C

17. What will the people in the white room do, compared with the people in the dark brown room? A) They will spend less

答案是：C

16. What can be concluded from the two experiments? A) Beautiful decorations and a white color will cause people to rea

答案是：D

15.Which babies have trouble in learning to speak? A) Some severely retarded children. B) Stupid babies. C) Deaf

答案是：C

14. Who can learn at least one language? A) Deaf babies. B) Some severely retarded children. C) All human beings w

答案是：C

13. Which word of the following describes all languages? A) Systematic. B) Primitive C) Limited.

答案是：A

12. About how many sound patterns does English have? A) 15. B) 45. C) 30. D) 75.

答案是：B

11. What three things does every language consist of? A) Spelling, sound rules, and small and capitalized letters. B)

答案是：D

10. What do we learn form the last paragraph? A) The effects of positive thinking vary form person to person. B) M

答案是：B

9. What do we learn from the experiment of Wood, Lee and Perunovic? A) It is important for people to continually incr

答案是：B

8. What does the author mean by “…you’re just underlining his faults”(Para. 3)? A) You are pointing out the errors he

答案是：D

7. What is the finding of the Canadian researchers? A) Encouraging positive thinking may do more harm than good. B

答案是：A

6. What do we learn from the first paragraph about the self-help industry? A) It was established by Norman Vincent Pe

答案是：B

5. The two examples illustrate the principle that __________. A) it is important to let children develop in the way the

答案是：B

4. Winston’s parents push their son so much that __________. A) he is unhappy because he is not self-confident B) he h

答案是：A

Which of the following statements about Michael Lee’s parents is true? A) His father is a very poor player of trumpet.

答案是：D

2. What should parents do in order to help their children succeed? A) They should push the children into achieving a lo

答案是：B

1. Which of the following mistakes are parents likely to make according to the passage? A) To neglect their child’s edu

答案是：B

我要和我的同事们好好谈谈这份合同

答案是：I need to talk this contract over with my colleagues.

你应该舒展一下筋骨，做做运动。

答案是：You should stretch your body and do some exercises.

这个论点得到了大多数人的支持。

答案是：This argument received support from most people.

会议期间，请把手机调至静音状态。

答案是：Please set your cell phone in silent mode during the meeting.

我们为顾客提供各种优质商品。

答案是：. We supply our customers with a variety of goods with high quality.

5. Items like insurance policies should also be labeled and file so that you can readily find them if and when you need

答案是：向保险单这样的文件也要分类归档，以便在你需要的时候能很容易地找到它们。

4. The game between Houston Rockets and New York Knicks in 1994 was the first NBA Finals televised live in China.

答案是：1994年休斯顿火箭队与纽约尼克队之间的比赛是首个在中国进行实况转播的NBA决赛

3. The first, and maybe the most important step, is to set a budget for yourself and stick by it.

答案是：3. 首先，而且或许会是最重要的一步就是要为自己做好预算，而且要按照预算来执行。

2. Society did not break down and all levels of government, including the military, came together to effectively limit a

答案是：2. 社会没有崩溃，所有级别的政府单位，包括军队，都齐心协力，有效地控制了不必要的损失和后果。

1. Each of these problems has serious effects on our health and well-being as well as on the whole environment.

答案是：1. 这些问题已严重影响到我们的幸福和健康，也影响到整个环境。

We were young; we were smart; we were looking forward to the world of work. And _____(1) we graduated from Oxford Univer

答案是：1-6ABCBA;6-10BBCDA;11-15BBCDB;16-20ABCBA

20. Which of the following is TRUE according to the passage? 　　A) You should limit your mobile phone calls to personal

答案是：C

19. The author implies that the use of mobile phones in such places as museums should be__. A) limited B) expe

答案是：A

18. When you are calling in a noisy area, you are advised to_______. A) use a more sensitive microphone. B) shout lou

答案是：D

17. Putting your mobile phone on a restaurant table may make your friends think______. A) you prefer to talk to yo

答案是：B

16. What should you do when you need to answer a phone call during a performance? A) Call back after the performance.

答案是：C

15. The student organizations seem to be effective in ______ A)dealing with the academic affairs of the university

答案是：B

14. Some students are enthusiastic for positions in student organizations probably because ___. A) they hate the

答案是：C

13. American university students are usually under pressure of work because ______ A)their academic performance will

答案是：A

12. According to the first paragraph an American student is allowed _____ A)to live in a different university

答案是：B

11. Normally a student would at least attend ______ classes each week. A) 36 B) 12 C) 20

答案是：B

10. Social companionship is beneficial in that _______. A) it helps strengthen our ties with relatives B) it enables

答案是：D

9. Helping a sick neighbor with some repair work is an example of _______. A) instrumental support B) informational

答案是：A

8. Which of the following is closest in meaning to the word “cushions” (Line 1, Para.2)? A) Adds up to. B)

答案是：A

7. Research shows that people’s physical and mental health _______. A) relies on the social welfare systems which supp

答案是：B

6. Interpersonal relationships are important because _______. A) they are indispensable to people’s social well-being

答案是：A

Which of the following is TRUE according to the passage? A)Much more suspects are proved guilty because of the presence

答案是：D

4. Which of the following is a result of an inaccurate eyewitness testimony? A)It will be excluded by the judge from a

答案是：A

The word “lineup” (Paragraph) most probably means __________? A) a group of people who agreed to be involved in a crime

答案是：C

2. What is the function of eyewitness testimony? A)It can be relied on to detect criminals in all cases. B)It provides

答案是：C

1. Which of the following can lead to the inaccuracy of eyewitness testimony? A)The witness is shown photos of similar

答案是：A

20. He will only see you by __________. A) apartment B) appointment C) face

答案是：B

19. We should _______ his suggestion into consideration A) take B) bring C) turn

答案是：A

18. The author of the report is well _________ with the problems in the hospital because he has been working there for m

答案是：B

17. This kind of sports actively ________ to young people. A) brings B) appeals C) refers

答案是：B

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